Title: Electrochemical storage cell containing a substituted anisole or di-anisole redox shuttle additive for overcharge protection and suitable for use in liquid organic and solid polymer electrolytes

Abstract

A electrochemical cell is described comprising an anode, a cathode, a solid polymer electrolyte, and a redox shuttle additive to protect the cell against overcharging and a redox shuttle additive to protect the cell against overcharging selected from the group consisting of: (a) a substituted anisole having the general formula (in an uncharged state): ##STR1## where R.sub.1 is selected from the group consisting of H, OCH.sub.3, OCH.sub.2 CH.sub.3, and OCH.sub.2 phenyl, and R.sub.2 is selected from the group consisting of OCH.sub.3, OCH.sub.2 CH.sub.3, OCH.sub.2 phenyl, and O.sup.- Li.sup.+ ; and (b) a di-anisole compound having the general formula (in an uncharged state): ##STR2## where R is selected from the group consisting of -OCH.sub.3 and -CH.sub.3, m is either 1 or 0, n is either 1 or 0, and X is selected from the group consisting of -OCH.sub.3 (methoxy) or its lithium salt --O.sup.- Li.sup.+. The lithium salt of the di-anisole is the preferred form of the redox shuttle additive because the shuttle anion will then initially have a single negative charge, it loses two electrons when it is oxidized at the cathode, and then moves toward the anode as a single positively charged species where it is then reduced tomore » a single negatively charged species by gaining back two electrons. « less

Inventors:

Kerr, John B ^[1]; Tian, Minmin ^[2]

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1. Oakland, CA
2. Kobe, JP

Issue Date:

2000-01-01

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

OSTI Identifier:

872937

Patent Number(s):

6045952

Assignee:

United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

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H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M10/4235 - {Safety or regulating additives or arrangements in electrodes, separators or electrolyte
H01M2200/00 - Safety devices for primary or secondary batteries
H01M4/60 - of organic compounds
H01M6/166 - {by the solute}
H01M6/168 - {by additives}
H01M6/181 - {with polymeric electrolytes

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/10 - Energy storage

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DOE Contract Number:  

AC03-76SF00098

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

electrochemical; storage; cell; containing; substituted; anisole; di-anisole; redox; shuttle; additive; overcharge; protection; suitable; liquid; organic; solid; polymer; electrolytes; described; comprising; anode; cathode; electrolyte; protect; overcharging; selected; consisting; formula; uncharged; str1; och; phenyl; compound; str2; -och; -ch; methoxy; lithium; salt; -o; preferred; form; anion; initially; single; negative; charge; loses; electrons; oxidized; moves; positively; charged; species; reduced; negatively; gaining; positively charged; charged species; negatively charged; shuttle additive; electrochemical storage; electrochemical cell; polymer electrolyte; solid polymer; cell containing; preferred form; redox shuttle; lithium salt; storage cell; polymer electrolytes; described comprising; overcharge protection; liquid organic; negative charge; cell contain; /429/